Found in 1991, Hangzhou Tongxing Electron  is a professional CATV manufacturer. We have two  branches. One manufacture optical transmission equipments including 1550 external modulation optical transmitter, 1550 EDFA, 1310nm optical transmitter, optical receivers/nodes, trunk amplifier, taps& splitters. The other branch manufacture optical couplers, pigtails, DWDM,CWDM, optical connectors and so on.